US20210052824A1 - Injection device - Google Patents
Injection device Download PDFInfo
- Publication number
- US20210052824A1 US20210052824A1 US16/314,294 US201716314294A US2021052824A1 US 20210052824 A1 US20210052824 A1 US 20210052824A1 US 201716314294 A US201716314294 A US 201716314294A US 2021052824 A1 US2021052824 A1 US 2021052824A1
- Authority
- US
- United States
- Prior art keywords
- bead
- sheath
- interface
- contact
- attachment portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
Abstract
Description
- This invention relates to an injection device and a syringe provided with such a device.
- A preferred application is in the medical devices and accessories industry.
- In the medical field, devices are known to enable injections to be carried out using a needle, this term being understood here as any pointed device enabling a fluid to pass therein towards the human or animal body in particular. In particular, such a device in the form of a syringe comprising a body and a piston that can slide in the body is known from document WO 2004/014470 A1. In addition, to carry out the injection, the syringe includes an injection device attached to the head of the syringe body and provided with a needle. Such a device is illustrated in
FIGS. 1 to 3 . The device attached to the head of the syringe body comprises a part enabling it to be mounted on said body, as a mechanical interface and a part which the needle is assembled on, forming the sheath receiving this needle. The sheath and the interface are in mutual contact. Nevertheless, according to this anteriority, the needle is retractable into the syringe body once the injection operations are completed. This provision provides greater safety of use for the medical device. To achieve this retraction, the sheath carrying the needle is disconnected from the interface as shown inFIG. 2 . The fact that the sheath and interface must move from a position where they are secured together and sealed to a position where they are disconnected raises sealing issues that are generally solved by separately applied O-rings. - The sealing techniques used in this way seriously increase the complexity of the assembly of the devices and their costs.
- A retractable syringe is also known from document WO AI 2013/067588, in which
FIG. 10 shows a mechanical retention of a sheath secured to the needle with a base part; the base part has a protrusion that fits into a recess in the sheath; this contact of a protrusion in a recess is not very effective in terms of sealing. - The present invention makes it possible to solve all or at least some of the drawbacks of the current techniques.
- An aspect of the invention relates to an injection device, comprising an interface for mounting on a syringe body, with the interface comprising an internal passage delimited by an inner wall, a needle and a sheath for receiving the needle, with said sheath comprising an outer wall provided with a contact portion of said sheath against an attachment portion of the inner wall of the interface
- Advantageously, the contact portion includes a first bead and the attachment portion includes a second bead, with the first and second beads each forming a ring protruding respectively on the contact portion and the attachment portion, with the first bead being in contact with the second bead.
- The invention also relates to a syringe with a body, a piston capable of sliding in the body, and a device as described above.
- According to one aspect, a third bead is present so that one of the beads is framed by two beads. There is therefore a lateral contact on either side of a bead; this assembly is more efficient to stop the translation of the sheath relative to the interface; and it is less hyperstatic than those existing because two contacts with a reduced surface area around the central bead are provided. The contact between two beads can be along a line so that sizing or adjustment problems are reduced. This solution is much more efficient than those known in which a bead is inserted into a recess.
- Other characteristics, aims and advantages of the present invention will appear upon reading the following detailed description and referring to the appended drawings given as non-limiting examples and wherein:
-
FIG. 1 shows an overview of a syringe according to the state of the art described in document WO 2004/014470 A1; -
FIG. 2 is a view of this state of the art, showing a retracted position of the needle; -
FIG. 3 is a detailed view of this state of the art showing the cooperation between the interface and the sheath of the device mounted on the top of the syringe; -
FIG. 4 is a sectional view of one embodiment of the invention; - Prior to going into details relating to the preferred embodiments of the invention while referring more particularly to the drawings, other optional characteristics of the invention which may be implemented in any combination or alternately, are mentioned hereafter:
-
- one of the contact portion and the attachment portion has a
third bead 18; - the
third bead 18 and the other bead of the one of the contact portion and the attachment portion which includes thethird bead 18 frame the bead of the other one of the contact portion and the attachment portion; - the bead of the other one of the contact portion and the attachment portion is in contact with both the
third bead 18 and the other bead of the other one of the contact portion and the attachment portion which includes thethird bead 18; - the contact portion comprises only the
first bead 16, and the attachment portion comprises thesecond bead 17 and thethird bead 18; - the contact portion is cylindrical around the
first bead 16; - the attachment portion is cylindrical around the
second bead 17; - at least one of the beads has an arc-shaped longitudinal section;
- the
sheath 8 comprises aninner channel 13 including aseat 10 so configured as to accommodate a proximal end of theneedle 19, with saidchannel 13 having a section extending beyond the end of the contact portion opposite theseat 10, with said section having a transverse opening 14; - the
sheath 8 is mounted sliding relative to theinterface 3, with the beads forming stops against sliding; - the device comprises no O-ring between the
sheath 8 and theinterface 3.
- one of the contact portion and the attachment portion has a
- For the proper understanding of the invention, the following definitions shall apply:
-
- longitudinal direction 15: the long dimension of the syringe and/or injection device; generally speaking, the body of the syringe and possibly any other part of the invention may have symmetry around the longitudinal direction;
- transverse and lateral mean a direction perpendicular to the
longitudinal direction 15; - needle means any pointed device used to perform an injection function, in particular the injection of fluid into the human or animal body.
- The state of the art device shown in
FIG. 1 typically comprises asyringe body 1 here essentially cylindrical in shape and having a proximal end with a mouthpiece for receiving apiston 6 and an opposite distal end for receiving an injection device with a needle. At its distal end, thebody 1 has a narrowed section head produced by ashoulder 5. Advantageously, the injection device is provided with a cap during storage. This provides protection to theneedle 19. -
FIG. 2 shows theneedle 19 retraction function. To achieve this, thepiston 6 has, at its distal end, a device enabling it to cooperate with a portion of the injection device which theneedle 19 is mounted on. Thus, when thepiston 6 is sufficiently deep into thebody 1, it is docked to the part secured to theneedle 19 and a subsequent sliding action of thepiston 6 tending to pull it out of thebody 1 enables theneedle 19 to be retracted from inside thebody 1 as shown inFIG. 2 . As shown inFIG. 2 , a reduced cross-section of thepiston 6 may provide a breakable area so as to break the piston and avoid excessive dimensions in this position. It is easy to understand that theneedle 19 is thus protected, which offers greater safety than the most conventional syringes. -
FIG. 3 is a detailed drawing illustrating, according to the state of the art, a possible mounting of the needle. In this figure, aninterface 3 is mounted at the head of thebody 1 and cooperates with asheath 8 provided with an inner channel for receiving theneedle 19. At its end opposite the receiving area of theneedle 19, thesheath 8 has means for securing with the distal end of thepiston 6. The contact between theinterface 3 and thesheath 8 is provided without any particular provision as regards sealing, which may lead to leaks or the need for an additional seal. - As a counterpoint to what is shown in
FIGS. 1 to 3 ,FIG. 4 presents a non-exhaustive embodiment of the invention. - The
interface 3 has an internal passage delimited by awall 11. A proximal portion of this passage can be used to mount the device of the invention on thehead 4 of a syringe. In the case illustrated, thehead 4 also has a double wall for cooperating with theinterface 3. The internal passage of theinterface 3 also receives thesheath 8, which extends in thelongitudinal direction 15. Advantageously, achannel 13 inside thesheath 8 enables the fluid to flow therethrough in order to supply theneedle 19 arranged at an upper portion as aseat 10 of thesheath 8. At thisseat 10, a cylinder-to-cylinder branch is advantageously formed with the proximal end of theneedle 19. Between these two ends, thesheath 8 is secured to theinterface 3. More precisely, a contact portion of theouter wall 12 of thesheath 8 cooperates with an attachment portion of theinner wall 11 of theinterface 3. This cooperation is advantageously removable so as to enable a retracted configuration of the device as shown in the example ofFIG. 2 . Thus, the securing of thesheath 8 in theinterface 3 can be so configured as to be overcome by a sufficient force, especially from a user during a phase of action on the piston, driving thesheath 8 once it is docked at the end ofpiston 6. - To obtain this assembly,
beads sheath 8 and theinterface 3. An example of the forming of such beads is illustrated inFIG. 4 . Beads mean a part protruding relative to the rest of the peripheral surface of the portion under consideration, with such portion extending as a ring forming a continuous belt at a certain level in thelongitudinal direction 15. For example, the bead may have an arc-shaped section as in the case shown inFIG. 4 . - At a minimum, two beads are each formed on one of the
sheath 8 and theinterface 3. Thus,FIG. 4 shows afirst bead 16 on the outer wall of thesheath 8 and asecond bead 17 on the inner wall of theinterface 8. Thebeads third bead 18 is made, here on theinterface 3. Advantageously, thebead 16 is framed by the second and thethird beads bead 16 is preferably in simultaneous contact with the other two beads. It should be understood that this arrangement precisely immobilizes thesheath 8 and ensures a double contact that prevents leaks. - Advantageously, the rest of the contact portion and the attachment portion of the
sheath 8 and theinterface 3 is not protruding around thebeads - According to a possible embodiment illustrated in
FIG. 4 , thesheath 8 has, in the area of securing with the interface 3 (including the beads), a cylindrical outer wall (it can also be tapered) which the bead(s) carried by thesheath 8 protrude(s) on. Similarly, the inner wall of theinterface 3 has a cylindrical shape (it can also be tapered) in the area of securing to theinterface 3, which the bead(s) carried by theinterface 3 protrude(s) on. - Cooperation is thus preferably centred on areas having circular cross-sections and the beads are projections protruding from a base surface having a circular cross-section. The beads then cooperate in small contact areas, mainly circular lines. There may be no further contact between the sheath and the interface in the area where the beads are present, or even no further contact stopping the translation between the sheath and the interface along their length.
- It is desirable for the beads to be so configured that they only come into contact with each other, and not with other parts of the sheath and the interface.
- Generally speaking, the beads are all protruding relative to the portion of the sheath or the interface that carries them. Preferably, the portion that carries two beads includes an intermediate area between these beads, with this area being cylindrical in shape and/or so configured that there is no contact between this area and the bead of the other portion.
- It should be noted, in the case shown in
FIG. 4 , that thesheath 8 extends through theentire interface 3 so that it opens at a distal end on which theseat 10 is formed, and at a proximal end inside thesyringe body 1. Achannel 13 advantageously extends throughout thesheath 8, so as to enable a fluid to flow from the storage area inside thebody 1 to theinjection needle 19. Preferably, in at least a portion of the length of thesheath 8, thechannel 13 opens laterally so that the fluid can be admitted inside same. These can be transverse apertures enabling the fluid to enter when compressed by the action of the piston. The fluid can then pass through the rest of thechannel 13 until it exits out of the syringe. Advantageously, thesheath 8 extends short of the proximal end of theinterface 3 towards thebody 1 and penetrates into the main volume of thebody 1, below theshoulder 5. - The components of the
sheath 8 and theinterface 3 are preferably each solid and made of a single piece of material, this material being preferably a plastic material. It should be understood that the beads can easily be manufactured completely with each of these parts, by conformation, especially when moulding same. -
- 1. Syringe body
- 2. Cap
- 3. Interface
- 4. Head
- 5. Shoulder
- 6. Piston
- 7. Securing area
- 8. Sheath
- 9. Proximal end
- 10. Seat
- 11. Inner wall
- 12. Outer wall
- 13. Channel
- 14. Transverse opening
- 15. Longitudinal direction
- 16. First bead
- 17. Second bead
- 18. Third bead
- 19. Needle
Claims (10)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1656054A FR3053255A1 (en) | 2016-06-29 | 2016-06-29 | INJECTION DEVICE |
FR1656054 | 2016-06-29 | ||
PCT/EP2017/061782 WO2018001625A1 (en) | 2016-06-29 | 2017-05-17 | Injection device |
Publications (2)
Publication Number | Publication Date |
---|---|
US20210052824A1 true US20210052824A1 (en) | 2021-02-25 |
US11730893B2 US11730893B2 (en) | 2023-08-22 |
Family
ID=56855688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/314,294 Active 2038-02-15 US11730893B2 (en) | 2016-06-29 | 2017-05-17 | Injection device |
Country Status (6)
Country | Link |
---|---|
US (1) | US11730893B2 (en) |
EP (1) | EP3478346A1 (en) |
BR (1) | BR112018077438B1 (en) |
FR (1) | FR3053255A1 (en) |
RU (1) | RU2769834C2 (en) |
WO (1) | WO2018001625A1 (en) |
Family Cites Families (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4804370A (en) | 1987-03-13 | 1989-02-14 | Habley Medical Technology Corporation | Disease control syringe having a retractable needle |
DE69022066T2 (en) | 1989-11-08 | 1996-02-22 | Curie | SYRINGE WITH A RETRACTABLE NEEDLE HOLDER. |
US5328475A (en) | 1993-12-16 | 1994-07-12 | Chen Long Hsiung | Simplified safety syringe with retractable self-biased needle |
US5575774A (en) | 1995-10-24 | 1996-11-19 | Chen; Long-Hsiung | Structure of safety hypodermic syringe |
MY127310A (en) | 2000-04-28 | 2006-11-30 | Sumitomo Rubber Ind | Deproteinizing agent, deproteinized natural rubber latex using the same, and method of producing rubber product |
IL156347A0 (en) | 2000-12-22 | 2004-01-04 | Nicodel S A | Medical device and locking mechanism therefor |
US6669666B2 (en) | 2001-08-13 | 2003-12-30 | Wen-Chin Lu | Safety syringe |
GR20020100365A (en) | 2002-08-06 | 2004-04-22 | Nicodel S.A. | Medical device |
NL1021689C2 (en) * | 2002-10-18 | 2004-05-12 | Advanced Protective Injection | Injection syringe for delivering medication on patient comprises liquid container, needle with needle mount, and blocker |
US20040210198A1 (en) * | 2003-04-18 | 2004-10-21 | Life-Shield Products, Inc. | Safety retractable type syringe |
USD579561S1 (en) | 2004-01-30 | 2008-10-28 | Physician Industries, Inc. | Portion of a syringe |
RU2363500C2 (en) * | 2004-11-04 | 2009-08-10 | Глобал Медисейф Холдингз Лимитед | Safe syringe with removable pull-in needle |
US7947020B2 (en) | 2005-05-09 | 2011-05-24 | Safeshot Technologies, Llc | Retractable safety syringe |
US8152762B2 (en) | 2006-04-20 | 2012-04-10 | Safeshot Technologies, Llc | Plunger activated vacuum release mechanism for a syringe |
US8088104B2 (en) | 2006-05-24 | 2012-01-03 | Safeshot Technologies, Llc | Syringe |
USD621929S1 (en) | 2009-05-28 | 2010-08-17 | F. Hoffmann-La Roche Ag | Auto-injector |
USD623738S1 (en) | 2009-05-28 | 2010-09-14 | F. Hoffman La-Roche AG | Auto-injector |
USD618347S1 (en) | 2009-06-04 | 2010-06-22 | Cynthia Bradshaw | Applicator suppository injector |
USD689601S1 (en) | 2009-10-14 | 2013-09-10 | Marie Stopes International | Aspirator tube |
USD823459S1 (en) | 2009-12-15 | 2018-07-17 | Shl Group Ab | Medical injector |
USD665497S1 (en) | 2010-07-28 | 2012-08-14 | Owen Mumford Limited | Torque limiting needle cap |
CA2826206A1 (en) | 2011-02-25 | 2012-08-30 | B. Braun Melsungen Ag | Flushing medical devices |
TWI527602B (en) | 2011-11-07 | 2016-04-01 | Fan Xiao Yi | Ordinary safety syringes |
WO2013070715A1 (en) | 2011-11-07 | 2013-05-16 | Battelle Memorial Institute | Injection devices with ergonomic enhancements |
EP2776097B1 (en) * | 2011-11-09 | 2018-07-25 | UNL Holdings LLC | Improved retractable syringe needle |
CA155016S (en) | 2013-08-06 | 2015-02-05 | Michael Perthu | Automatic injection device for hypodermic syringe |
US10702661B2 (en) | 2014-03-06 | 2020-07-07 | Union Medico Aps | Injection device |
USD789528S1 (en) | 2015-01-07 | 2017-06-13 | Sanofi-Aventis Deutschland Gmbh | Autoinjector cap |
USD779057S1 (en) | 2015-01-07 | 2017-02-14 | Sanofi-Aventis Deutschland Gmbh | Autoinjector cap |
USD783816S1 (en) | 2015-01-07 | 2017-04-11 | Sanofi-Aventis Deutschland Gmbh | Autoinjector cap |
-
2016
- 2016-06-29 FR FR1656054A patent/FR3053255A1/en not_active Withdrawn
-
2017
- 2017-05-17 RU RU2019109277A patent/RU2769834C2/en not_active Application Discontinuation
- 2017-05-17 BR BR112018077438-3A patent/BR112018077438B1/en active IP Right Grant
- 2017-05-17 WO PCT/EP2017/061782 patent/WO2018001625A1/en unknown
- 2017-05-17 EP EP17729384.2A patent/EP3478346A1/en not_active Withdrawn
- 2017-05-17 US US16/314,294 patent/US11730893B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US11730893B2 (en) | 2023-08-22 |
RU2769834C2 (en) | 2022-04-06 |
RU2019109277A3 (en) | 2021-09-14 |
FR3053255A1 (en) | 2018-01-05 |
BR112018077438A2 (en) | 2019-04-02 |
BR112018077438B1 (en) | 2023-11-14 |
RU2019109277A (en) | 2020-09-29 |
EP3478346A1 (en) | 2019-05-08 |
WO2018001625A1 (en) | 2018-01-04 |
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